Taizhou metal stamping parts, what are the reasons for chip jumping in blanking + 16 strict quality inspections

The hardware responsible for the hardware stamping parts of Taizhou said that the so-called chip jumping refers to the phenomenon that the scraps that have entered the edge of the die are taken out of the die surface by the punch when the continuous die is punched at high speed. Its existence will crush the strip or terminal, thereby affecting the quality of the product, shortening the life of the mold, and reducing the production efficiency. It is a 'big taboo' for high-speed continuous blanking production. The following Xiaoshuo takes you to take a look at the causes of jumping chips and prevention schemes based on practical experience: 　　1. Reasons for the formation of jumping chips 1. The main reason for the formation of jumping chips is the high-speed continuous punching process due to the punching speed. High (up to 800m/s or more) and the influence of cutting oil and other factors during the punching process, an instant partial vacuum is formed between the punch and the waste. When the material is very thin, the weight of the waste and the edge of the die When the sum of the frictional force is less than the adsorption force of the punch, the waste debris is adsorbed on the surface of the punch during the ascent of the punch, and then rises to form jumping debris. 2. Factors that affect chip jumping There are many factors that affect chip jumping. When the punch edge chipping or dullness, excessive cutting oil consumption, thin material, and the depth of the punch entering the die are too short, etc., they can all cause Jumping crumbs. 2. Methods to prevent chip jumping 1. Reduce the adsorption force between the punch and the waste. (1) The punch has a groove. For punches with a relatively large cross-section and regular symmetry, a small recess can be ground in the middle. Groove to reduce its contact area with waste.　　(2) For punches with larger cross-sections and irregular shapes, you can use diamond grinding rods to grind some pits on them.　　(3) In the design, blow holes are added to the punch to blow air to prevent jumping chips.　　(4) For the punch made of SKD11 material, a spring pin can be added to the punch in the design to prevent chip jumping. 2. Increase the friction (clamping force) of the cutting edge of the die against the scraps. 　　 (1) For the insert or the combined die, a drape pin can be used to 'cover' a place about 1mm below the cutting edge to increase the scrap The friction (clamping force) in the die.　　(2) For technical auxiliary steps, such as side edge, cutting edge of the material distribution station, etc., the shape of the waste can be appropriately complicated to increase the clamping force of the waste in the die, thereby preventing chip jumping.　　3. Other　　(1) Use a vacuum cleaner to suck up waste materials to prevent chip jumping. Use a vacuum cleaner at the bottom of the lower mold to form a negative pressure to suck up the scraps. Experiments have shown that this is also a good way to prevent jumping scraps.　　(2) For some small punches, when punching, the blanking opening should not be too small, otherwise it will cause debris accumulation due to electrostatic attraction of the waste.　　(3) Keep the punch and die cutting edges sharp, and add cutting oil in an appropriate amount, which is also helpful to prevent chip jumping.　　 In short, the reasons that affect chip jumping are complex, and there are many ways to prevent it. The above is just Xiaoshuo's simple understanding of the phenomenon of chip jumping during work and study. Whether it is appropriate and perfect, it needs further research and discussion. Hardware, 15 years of focusing on Taizhou metal stamping parts, 5000 square meters production workshop, hundreds of precision processing production equipment, more than 20 Ru0026D and design engineers, monthly processing capacity of 100+ sets of molds and production capacity of 3 million punching times per day, stamping accuracy can reach 0.01mm, 16 quality inspection layers are strictly controlled. It can quickly solve the urgent problem of time when choosing hardware stamping processing, solve the problem of stamping accuracy, and solve the problem of production quality. Over the past 15 years, I have been conscientious and dedicated to the results of your needs only for the results of your work!